From: "H. Peter Anvin" <hpa@zytor.com>
To: sidc7 <siddhartha.chhabra@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Kernel vs user memory
Date: Fri, 16 Jan 2009 22:26:48 -0800 [thread overview]
Message-ID: <49717A28.2060106@zytor.com> (raw)
In-Reply-To: <21512362.post@talk.nabble.com>
sidc7 wrote:
> The kernel maintains a free list of pages that are free in physical memory. I
> was wondering, are these pages in the kernel space ? They are not mapped to
> any of the user address space for sure, so will they be in the kernel memory
> ?
On a non-highmem kernel, they will be -- ALL memory is mapped in kernel
space on non-highmem kernels. For highmem kernels, they will generally
not be mapped at all, unless they are lowmem pages.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2009-01-17 6:27 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-17 2:56 Kernel vs user memory sidc7
2009-01-17 4:16 ` Bryan Donlan
2009-01-17 4:21 ` sidc7
2009-01-17 5:26 ` Bryan Donlan
[not found] ` <49f90a801003181710v5e08ccc8jdd26ec899e75bdb9@mail.gmail.com>
2010-03-19 0:28 ` Bryan Donlan
[not found] ` <49f90a801003181747m5078d9c2y3cc8421203a7b1e6@mail.gmail.com>
2010-03-19 1:06 ` Bryan Donlan
2010-03-19 1:29 ` Siddhartha Chhabra
2009-01-17 6:26 ` H. Peter Anvin [this message]
2009-01-17 6:34 ` sidc7
2009-01-17 6:38 ` H. Peter Anvin
2009-01-17 6:42 ` sidc7
2009-01-17 7:27 ` H. Peter Anvin
2009-01-19 20:03 ` sidc7
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